如何更新Windows 8 Metro風格的xml文件的節點？

我將在我的xml文件上向父節點添加一個新節點。這個代碼的單元測試說「成功」，它通過但沒有添加節點在XML中。如何更新Windows 8 Metro風格的xml文件的節點？

此外，一些測試我得到錯誤; < <訪問被拒絕。（異常來自HRESULT：0X80070005（E_ACCESSDENIED））>> 上線SaveToFileAsync

有什麼不對嗎？並有另一種方法來做到這一點？

public string ConnectionPath { get; set; } 
    protected string XPath { get; set; } 
    protected string XParentPath { get; set; } 
    protected XmlDocument Source { get; set; } 
    protected StorageFolder SFolder { get; set; } 
    protected StorageFile SFile { get; set; } 

    public RepositoryBase(string connectionPath) 
    { 
     this.ConnectionPath = connectionPath; 
    } 

    public async void Insert(T entity) 
    { 
     SFolder = Package.Current.InstalledLocation; 
     SFile = await SFolder.GetFileAsync(this.ConnectionPath); 
     var content = await FileIO.ReadTextAsync(SFile); 
     if (!string.IsNullOrEmpty(content)) 
     { 
      Source = new XmlDocument(); 
      Source.LoadXml(content); 
     } 
     var tagName = typeof(T).Name; 
     if (tagName != null) 
     { 
      IXmlNode parentNode = Source.SelectSingleNode(XParentPath); 
      if (parentNode != null) 
      { 
       XmlElement newNode = Source.CreateElement(tagName); 
       newNode.InnerText = GetContent(entity); 
       parentNode.AppendChild(newNode); 
      }    
     }   
     await Source.SaveToFileAsync(SFile); 
    }

* PlaceRepositoryClass;

public class PlaceRepository : RepositoryBase<Place> 
    { 
     public PlaceRepository() 
     : base("Data\\bla\\bla.xml") 
     { 

      XPath = "/Country[Id=1]/Cities/City[Id=1]/Places/Place"; 
      XParentPath = "/Country[Id=1]/Cities/City[Id=1]/Places"; 
     } 
    }

單位測試方法;

[TestMethod] 
public void AppendNode() 
{ 
    Place place = new Place() 
    { 
     Id = 40, 
     Name = "xxxxx", 
     SummaryPath = "yyyyy", 
     Logo = "xy.png", 
     LogoSmall = "xy_small.png", 
     Latitude = "32.423", 
     Longitude = "34.23424", 
     Content = new PlaceContent() { Items = new List<ContentItem>() { new ContentItem() { TextPath = "aaaa", Header = "bbbbb", AudioFilePath = "x.mp3" } } }, 
     Gallery = new PhotoGallery() { Photos = new List<Photo>() { new Photo() { Path = "ab.png", Text = "abab" } } } 
    }; 

    PlaceRepository repository = new PlaceRepository(); 
    repository.Insert(place); 
}

來源

2013-01-03 htcdmrl

你試圖寫一個文件，該文件的應用程序包的一部分，這是隻讀。您可以將文件複製到本地存儲並可能進行修改。

來源

2013-01-03 23:23:28

如何更新Windows 8 Metro風格的xml文件的節點？

回答

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